I am trying to upload Owners for Existing Application Roles. I tried using both 'Upload Role via Role Management' and 'Upload Role Associations' option but getting same error.
ERROR services.RoleversionService - Problem occured while uploading role-associations -- null\n","stream":"stdout","time":"2023-05-26T14:16:26.805937769Z"}"
Since you haven't attached the CSV that you are trying to use, I am attaching one sample, can you please check and update it as per your environment.
Also have you set Role Modification auto approve?